CN104913097A - Piezoelectric valve - Google Patents
Piezoelectric valve Download PDFInfo
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- CN104913097A CN104913097A CN201510346242.0A CN201510346242A CN104913097A CN 104913097 A CN104913097 A CN 104913097A CN 201510346242 A CN201510346242 A CN 201510346242A CN 104913097 A CN104913097 A CN 104913097A
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- piezoelectric
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- 238000007789 sealing Methods 0.000 claims abstract description 23
- 239000000919 ceramic Substances 0.000 claims description 23
- 230000000694 effects Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000005684 electric field Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000008093 supporting effect Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention relates to a piezoelectric valve which comprises two portions including a valve body and a drive circuit. A piezoelectric driving piece (7) is arranged in the valve body, the drive circuit controls actions of the piezoelectric driving piece (7), and opening and closing of the valve body are controlled through the piezoelectric driving piece (7). The piezoelectric valve is characterized in that one end of the piezoelectric driving piece (7) is a free end, the other end of the piezoelectric driving piece (7) is a fixed end, the fixed end is fixed to a valve seat (4), multiple leads (13) controlling the piezoelectric driving piece (7) are lead out through the fixed end and are connected to the drive circuit, a sealing pad (12) is fixedly arranged at the free end of the piezoelectric driving piece (7), the valve body is closed when a pilot hole (10) is closed by the sealing pad (12), the valve body is opened when the pilot hole (10) is opened by the sealing pad (12) and further is communicated, a supporting device (6) is fixedly arranged in a valve element upper cavity (2), and a tiny gap is reserved between the supporting device (6) and the piezoelectric driving piece (7).
Description
Technical field
The present invention relates to a kind of piezo electric valve, comprise valve and drive circuit two-part, arrange piezoelectric driving plate in described valve, drive circuit controls the action of piezoelectric driving plate, by the open and close of piezoelectric driving plate control valve.
Background technique
The piezo electric valve of piezoelectric driving plate control valve switch motion is used to have power consumption low, structure is simple, the advantage of light weight, existing piezo electric valve uses piezoelectric actuator (piezoelectric driving plate is also a kind of piezoelectric actuator) directly to control the switch motion of spool usually, can realize when controlling the fluid of small flow or low-pressure, but when controlling large discharge or high pressure fluid (such as civil running water), then need piezoelectric actuator can provide large output displacement and thrust, reach this object, piezoelectric actuator according to prior art making is very expensive, and then cause the piezo electric valve with it makes not popularize.
So will piezo electric valve be popularized, civilian particularly to be made also to use piezo electric valve, just must reduce the cost of piezo electric valve significantly, namely significantly will reduce the cost of piezoelectric actuator in piezo electric valve.
According to prior art and market demand, existing producer is proposed oneself piezo electric valve product, but their without exception expensive, its unit price is tens of even hundreds of times of same specification solenoid valve, and also there is strict requirement to controlled fluid, such as can not be used for the control to tap water, otherwise piezoelectric actuator used will damage; Finding according to the result for retrieval of existing patent, all there is similar defect in the technology relevant with piezo electric valve.Trace it to its cause is because piezoelectric actuator used does not insulate isolation well by control flowing medium.
In the high pressure fluid application of piezo electric valve, there is mild adhesion and make piezoelectric actuator self have distortion and exert oneself in the spool likely driven due to piezoelectric actuator, but does not have output displacement, makes the action of piezo electric valve unreliable.
Summary of the invention
According to above the deficiencies in the prior art, the technical problem to be solved in the present invention is: provide that a kind of cost is low, environmental protection and energy saving, life-span are long, the reliable piezo electric valve of working stability.
The technical solution adopted for the present invention to solve the technical problems is: a kind of piezo electric valve, comprise valve and drive circuit two-part, described valve is provided with valve seat and upper cover, in valve seat, pilot hole is set, main valve inlet and Main valve outlet, the import of main valve inlet connecting valve, the outlet of Main valve outlet connecting valve, flexible film main valve plug is set between main valve inlet and Main valve outlet, arranging pressure ring is fastened on the periphery of flexible film main valve plug on valve seat, flexible film main valve plug and valve seat and upper cover jointly surround and form spool epicoele, one end of pilot hole is communicated with the outlet of Main valve outlet or valve, the other end of pilot hole is communicated with spool epicoele, in flexible film main valve plug or base, equalizing orifice is set, one end of equalizing orifice is communicated with the import of main valve inlet or valve, the other end of equalizing orifice is communicated with spool epicoele, in spool epicoele, piezoelectric driving plate is set, it is characterized in that: the area of passage of equalizing orifice is not more than the area of passage of pilot hole, one end of described piezoelectric driving plate is free end, the other end is fixed end, this end is fixed on valve seat, the stranded conductor connecting piezoelectric driving plate is connected to drive circuit by the extraction of this fixed end, the free end of described piezoelectric driving plate is fixedly installed sealing gasket, when described sealing gasket closes pilot hole, described valve cuts out, when described sealing gasket opens pilot hole, and then when making pilot hole conducting, described valve conducting, at described spool epicoele internal fixtion, support device is set, one micro-gap is set between this support device and piezoelectric driving plate.
Gap width between support device and piezoelectric driving plate is 0.1mm ~ 0.3mm, support device to piezoelectric driving plate fixed end between distance a be about 1/3 ~ 1/2 of piezoelectric driving plate total length L, to improve stability and the reliability of piezoelectric driving plate work.
Described piezoelectric driving plate comprises elastic base plate and piezoelectric ceramic, the two sides of elastic base plate or only a face one or more pieces piezoelectric ceramics are set, and piezoelectric ceramic comprises single or multiple lift piezoelectric ceramic body; Described piezoelectric ceramic is according to the horizontal effect of inverse piezoelectric effect or the work of electric field induced strain effect; Described piezoelectric driving plate adopts the diastrophic working method of energising, and in the anchor portion sectional of piezoelectric driving plate, the fixed length b of piezoelectric ceramic is about 1mm ~ 3mm.
High-strength insulating enamelled coating and dielectric resilience glue-line are wrapped up from inside to outside successively in the surface of described piezoelectric driving plate, this dielectric resilience glue-line should have good media-resistant erosion performance, improve the adaptability of piezoelectric driving plate, also reduce the assembly technology of piezoelectric driving plate.
Described sealing gasket adopts the rubber or silica gel material making with favorable elasticity, to provide good sealability.
Described drive circuit adopts semi-conductor electricity sub block circuit design completely, without any mechanical movable parts, fus FU1 and fus FU2 is connected in input voltage loop, commutation diode D1-D4 forms bridge rectifier, the output negative pole ground connection of this bridge rectifier, one end of resistance R3, one end of electric capacity C1 ~ C3, one end of piezoelectric driving plate JZ and the source electrode ground connection successively of fet VT, resistance R1 ~ R3 connects successively, the positive pole of diode D6 is connected on the line between resistance R1 and resistance R2, the negative pole of diode D6 connects the power end VDD of electric capacity C2 and inverter ic, the input end A of electric capacity C1 and inverter ic is connected on the line between resistance R2 and resistance R3, the output terminal Y of inverter ic connects the grid of fet VT, the drain series resistance R4 series connection of fet VT forms discharge switch branch road, diode D5 is connected on the line between resistance R1 and resistance R0, and the output cathode of the positive pole contact resistance R1 of diode D5 and bridge rectifier, the negative pole contact resistance R0 of diode D5, one end of the other end contact resistance R4 of resistance R0, first be connected in parallel again after series connection, piezoelectric driving plate JZ and electric capacity C3 and resistance R4 fet VT series arm are in parallel, when described be input as VDC time, commutation diode D1-D4, electric capacity C1 and electric capacity C3 are not set in drive circuit, to eliminate unnecessary materials consumption.
The beneficial effect that piezo electric valve of the present invention has is: piezo electric valve of the present invention can adapt to the control needs of large discharge or high pressure flowing medium; The piezoelectric driving plate cost adopted is low, reduces the cost of piezo electric valve significantly; In the appearance of piezoelectric driving plate, dielectric isolation layer is set; protect piezoelectric driving plate well; be conducive to adapting to flowing medium; extend the life-span of piezo electric valve, also reduce the assembly technology requirement of piezoelectric driving plate, relative to existing solenoid valve; piezo electric valve consumptive material of the present invention is few; particularly the consumption of copper significantly reduces especially, arranges the support device of piezoelectric driving plate, makes the working stability of piezoelectric driving plate reliable.
Piezo electric valve of the present invention is novel in design, practical, has outstanding substantive distinguishing features and significant progress, can meet the actual demand of the common people completely.
Accompanying drawing explanation
Fig. 1 a is depicted as the schematic cross-section of the valve portion of piezo electric valve of the present invention, and in the figure, piezo electric valve is closed condition, and equalizing orifice is arranged in spool;
Fig. 1 b is depicted as the schematic cross-section of the valve portion of piezo electric valve of the present invention, and in the figure, piezo electric valve is closed condition, and equalizing orifice is arranged in valve seat;
Figure 2 shows that the schematic cross-section of piezo electric valve of the present invention when opening state;
Figure 3 shows that the piezoelectric driving plate schematic diagram all pasting piezoelectric ceramic in elastic base plate both side surface;
Figure 4 shows that the piezoelectric driving plate schematic diagram of the side surface mount piezoelectric ceramic at elastic base plate;
Figure 5 shows that the electrical schematic diagram of the drive circuit of described piezo electric valve;
Figure 6 shows that the partial enlarged drawing of Fig. 1 a;
Wherein: 1, flexible film main valve plug 2, spool epicoele 3, upper cover 4, valve seat 5, pressure ring 6, support device 71, piezoelectric ceramic 72, elastic base plate 7, JZ, piezoelectric driving plate 8, main valve inlet 9, Main valve outlet 10, pilot hole 11, equalizing orifice 12, sealing gasket 13, stranded conductor FU1, FU2, fus D1 ~ D6, diode R0 ~ R4, resistance C1 ~ C3, electric capacity IC, AND NOT gate VT, fet.
Further, a be support device (6) to piezoelectric driving plate (7) fixed end between distance, b is the fixed length of piezoelectric ceramic (71) in the anchor portion sectional of piezoelectric driving plate (7), and L is the total length of piezoelectric driving plate (7).
Embodiment
Be described further below in conjunction with the embodiment of accompanying drawing to piezo electric valve of the present invention.
Piezo electric valve of the present invention comprises valve and drive circuit two-part.
Fig. 1 a and Fig. 1 b is depicted as the schematic cross-section of the valve portion of piezo electric valve of the present invention respectively, and piezo electric valve is closed condition, and in fig 1 a, equalizing orifice is arranged in spool, and in Figure 1b, equalizing orifice is arranged in valve seat.In Fig. 1 a and Fig. 1 b, described valve is provided with valve seat (4) and upper cover (3), pilot hole (10) is set in valve seat (4), main valve inlet (8) and Main valve outlet (9), the import of main valve inlet (8) connecting valve, the outlet of Main valve outlet (9) connecting valve, flexible film main valve plug (1) is set between main valve inlet (8) and Main valve outlet (9), arranging pressure ring (5) is fastened on the periphery of flexible film main valve plug (1) on valve seat (4), flexible film main valve plug (1) jointly surrounds with valve seat (4) and upper cover (3) and forms spool epicoele (2), one end of pilot hole (10) is communicated with the outlet of Main valve outlet (9) or valve, the other end of pilot hole (10) is communicated with spool epicoele (2), in flexible film main valve plug (1) or base (4), equalizing orifice (11) is set, one end of equalizing orifice (11) is communicated with the import of main valve inlet (8) or valve, the other end of equalizing orifice (11) is communicated with spool epicoele (2), piezoelectric driving plate (7) is set in spool epicoele (2), it is characterized in that: the area of passage of equalizing orifice (11) is not more than the area of passage of pilot hole (10), one end of described piezoelectric driving plate (7) is free end, the other end is fixed end, this end is fixed on valve seat (4), the stranded conductor (13) connecting piezoelectric driving plate (7) is connected to drive circuit by the extraction of this fixed end, the free end of described piezoelectric driving plate (7) is fixedly installed sealing gasket (12), when described sealing gasket (12) closes pilot hole (10), described valve cuts out, when described sealing gasket (12) opens pilot hole (10), and then when making pilot hole (10) conducting, described valve conducting.
At described spool epicoele (2) internal fixtion, support device (6) is set, between this support device (6) and piezoelectric driving plate (7), a micro-gap is set, this gap width is 0.1mm ~ 0.3mm, support device (6) to piezoelectric driving plate (7) fixed end between distance a be about 1/3 ~ 1/2 of piezoelectric driving plate (7) total length L, thus improve piezoelectric driving plate (7) stability that works and reliability.
Sealing gasket (12) adopts the rubber or silica gel material making with favorable elasticity, with sealing needs during satisfied closedown pilot hole.
As shown in accompanying drawing 3 and accompanying drawing 4, described piezoelectric driving plate (7) comprises elastic base plate (72) and piezoelectric ceramic (71), the two sides of elastic base plate (72) or only a face one or more pieces piezoelectric ceramics (71) are set, and piezoelectric ceramic (71) comprises single or multiple lift piezoelectric ceramic body; Described piezoelectric ceramic (71) works according to the horizontal effect of inverse piezoelectric effect or electric field induced strain effect (document had is called electrostriction effect); Described piezoelectric driving plate (7) adopts the diastrophic working method of energising, and the complete description of relevant piezoelectric driving plate (7) service behaviour aspect has been proposition in ZL 2,012 1 0594004.8 in the patent No., is used for reference at this.
As shown in accompanying drawing 1a, accompanying drawing 3 accompanying drawing 4 and accompanying drawing 6, in the anchor portion sectional of piezoelectric driving plate (7), the fixed length b of piezoelectric ceramic (71) is about 1mm ~ 3mm, is conducive to playing exerting oneself of piezoelectric driving plate (7).
High-strength insulating enamelled coating and dielectric resilience glue-line are wrapped up from inside to outside successively in the surface of described piezoelectric driving plate (7), this dielectric resilience glue-line should have good media-resistant erosion performance, under the prerequisite not affecting piezoelectric driving plate (7) service behaviour, make piezoelectric driving plate (7) and controlled flowing medium and well insulate and isolate, improve the adaptability of piezoelectric driving plate (7), piezoelectric driving plate after insulation isolation processing has become independent load module, so assembling easily, and then also reduce the assembly technology requirement of piezoelectric driving plate (7).
As shown in Figure 5, described drive circuit adopts semi-conductor electricity sub block circuit design completely, without any mechanical movable parts, it is characterized in that: fus FU1 and fus FU2 is connected in input voltage loop, commutation diode D1-D4 forms bridge rectifier, the output negative pole ground connection of this bridge rectifier, one end of resistance R3, one end of electric capacity C1 ~ C3, one end of piezoelectric driving plate JZ and the source electrode ground connection successively of fet VT, resistance R1 ~ R3 connects successively, the positive pole of diode D6 is connected on the line between resistance R1 and resistance R2, the negative pole of diode D6 connects the power end VDD of electric capacity C2 and inverter ic, the input end A of electric capacity C1 and inverter ic is connected on the line between resistance R2 and resistance R3, the output terminal Y of inverter ic connects the grid of fet VT, the drain series resistance R4 series connection of fet VT forms discharge switch branch road, diode D5 is connected on the line between resistance R1 and resistance R0, and the output cathode of the positive pole contact resistance R1 of diode D5 and bridge rectifier, the negative pole contact resistance R0 of diode D5, one end of the other end contact resistance R4 of resistance R0, first be connected in parallel again after series connection, piezoelectric driving plate JZ and electric capacity C3 and resistance R4 fet VT series arm are in parallel, when described be input as VDC time, commutation diode D1-D4, electric capacity C1 and electric capacity C3 are not set in drive circuit, to eliminate unnecessary materials consumption.Certainly, this circuit overall scheme also the patent No. be in ZL 2,012 1 0594004.8 propose, used for reference at this, wherein resistance R0 is buffer resistance.
To control tap water, the working principle of piezo electric valve of the present invention is:
As shown in accompanying drawing 1a and accompanying drawing 1b, now piezoelectric driving plate (7) not energising, piezoelectric driving plate (7) does not produce distortion and makes sealing gasket (12) confined bed valve opening (10), the water at main valve inlet (8) place enters spool epicoele (2) through equalizing orifice (11), pressure now in spool epicoele (2) is greater than the pressure at Main valve outlet (9) place, thus make flexible film main valve plug (1) close Main valve outlet (9), block current, valve is in closed condition.
As shown in Figure 2, when after piezoelectric driving plate (7) energising, piezoelectric driving plate (7) produces bending deflection and drives sealing gasket (12) to leave pilot valve hole (10), thus open pilot valve hole (10), spool epicoele (2) is communicated with Main valve outlet (9) by pilot valve hole (10), pressure in spool epicoele (2) reduces, water in spool epicoele (2) flows to Main valve outlet (9) by pilot valve hole (10), the pressure of main valve inlet (8) place water is greater than the pressure in spool epicoele (2) and is directed upwardly, thus promote flexible film main valve plug (1) generation deflection deformation upwards, flexible film main valve plug (1) is made to open Main valve outlet (9), water enters Main valve outlet (9) from water intake through main valve inlet (8), finally flow out from water outlet, as the direction in accompanying drawing 2 indicated by curved arrow, valve is in opening state.
When after piezoelectric driving plate (7) power-off, fet VT in drive circuit releases the electric charge stored in piezoelectric driving plate (7) at once, piezoelectric driving plate (7) drives sealing gasket (12) to return to the state shown in accompanying drawing 1a and accompanying drawing 1b, and then make sealing gasket (12) confined bed valve opening (10), pressure now in spool epicoele (2) is greater than the pressure at Main valve outlet (9) place, the water budget hole (11) at main valve inlet (8) place enters spool epicoele (2), promote flexible film main valve plug (1) and produce downward deflection deformation, until make flexible film main valve plug (1) close the state of Main valve outlet (9), valve is in closed condition.
The cross-section area of pilot hole (10) is much smaller than the cross-section area of main valve inlet (8) and Main valve outlet (9), so by the fluid flow of main valve inlet (8) and Main valve outlet (9) and pressure much larger than the fluid flow and the pressure that pass through pilot hole (10), namely piezoelectric driving plate (7) is with the less fluid of exerting oneself with Bit andits control large discharge and high pressure, so the cost of piezoelectric driving plate (7) is very low.
Be describing of ZL 2,012 1 0594004.8 and for the research of piezo electric valve and find in conjunction with scheme of the present invention according to the patent No., compared with existing same specification solenoid valve, the steady state power consumption of piezo electric valve is almost negligible, but cost difference is little.
In the anchor portion sectional of piezoelectric driving plate (7), the fixed length b of piezoelectric ceramic (71) is about 1mm ~ 3mm, the excessive output displacement that will affect piezoelectric driving plate (7) of b value, and the too small effect of exerting oneself to strengthening piezoelectric driving plate (7) of b value is little.
Also have, in the course of the work, if piezoelectric driving plate (7) can not drive sealing gasket (12) to leave pilot hole (10), then piezoelectric driving plate (7) self will produce bending deflection, example is depicted as with accompanying drawing 1a, piezoelectric driving plate (7) will present recessed supine shape, and intermediate portion will move down, when touching support device (6), because support device (6) is to the supporting effect of piezoelectric driving plate (7), thus increase exerting oneself of piezoelectric driving plate (7) free end, and then drive sealing gasket (12) to leave pilot hole (10), improve the reliability of piezo electric valve action.
Fixed end and the free end of support device (6) distance piezoelectric driving plate (7) are nearer, then the support effect of support device (6) is poorer.
Finally, piezo electric valve described in above embodiment is normally close valve, normally open valve can also be realized according to technical solutions according to the invention, namely valve opens at ordinary times, the valve closing when piezoelectric driving plate (7) obtains driving voltage, certainly, technician is when understanding technical solutions according to the invention, and this embodiment is also apparent.
Certainly, when not departing from framework of the present invention, can also there be other selection and development and we can pre-conceivable equivalent device.
Claims (6)
1. a piezo electric valve, comprise valve and drive circuit two-part, described valve is provided with valve seat (4) and upper cover (3), pilot hole (10) is set in valve seat (4), main valve inlet (8) and Main valve outlet (9), the import of main valve inlet (8) connecting valve, the outlet of Main valve outlet (9) connecting valve, flexible film main valve plug (1) is set between main valve inlet (8) and Main valve outlet (9), arranging pressure ring (5) is fastened on the periphery of flexible film main valve plug (1) on valve seat (4), flexible film main valve plug (1) jointly surrounds with valve seat (4) and upper cover (3) and forms spool epicoele (2), one end of pilot hole (10) is communicated with the outlet of Main valve outlet (9) or valve, the other end of pilot hole (10) is communicated with spool epicoele (2), in flexible film main valve plug (1) or base (4), equalizing orifice (11) is set, one end of equalizing orifice (11) is communicated with the import of main valve inlet (8) or valve, the other end of equalizing orifice (11) is communicated with spool epicoele (2), piezoelectric driving plate (7) is set in spool epicoele (2), it is characterized in that: the area of passage of equalizing orifice (11) is not more than the area of passage of pilot hole (10), one end of described piezoelectric driving plate (7) is free end, the other end is fixed end, this end is fixed on valve seat (4), the stranded conductor (13) connecting piezoelectric driving plate (7) is connected to drive circuit by the extraction of this fixed end, the free end of described piezoelectric driving plate (7) is fixedly installed sealing gasket (12), when described sealing gasket (12) closes pilot hole (10), described valve cuts out, when described sealing gasket (12) opens pilot hole (10), and then when making pilot hole (10) conducting, described valve conducting, support device (6) is set at described spool epicoele (2) internal fixtion, between this support device (6) and piezoelectric driving plate (7), a micro-gap is set.
2. piezo electric valve according to claim 1, it is characterized in that: the gap width between support device (6) and piezoelectric driving plate (7) is 0.1mm ~ 0.3mm, support device (6) to piezoelectric driving plate (7) fixed end between distance a be about 1/3 ~ 1/2 of piezoelectric driving plate (7) total length L.
3. piezo electric valve according to claim 1, it is characterized in that: described piezoelectric driving plate (7) comprises elastic base plate (72) and piezoelectric ceramic (71), the two sides of elastic base plate (72) or only a face one or more pieces piezoelectric ceramics (71) are set, and piezoelectric ceramic (71) comprises single or multiple lift piezoelectric ceramic body; Described piezoelectric ceramic (71) is according to the horizontal effect of inverse piezoelectric effect or the work of electric field induced strain effect; Described piezoelectric driving plate (7) adopts the diastrophic working method of energising, and in the anchor portion sectional of piezoelectric driving plate (7), the fixed length b of piezoelectric ceramic (71) is about 1mm ~ 3mm.
4. the piezo electric valve according to claim 1 or 3, is characterized in that: high-strength insulating enamelled coating and dielectric resilience glue-line are wrapped up from inside to outside successively in the surface of described piezoelectric driving plate (7).
5. piezo electric valve according to claim 1, is characterized in that: described sealing gasket (12) adopts the rubber or silica gel material making with favorable elasticity.
6. piezo electric valve according to claim 1, described drive circuit adopts semi-conductor electricity sub block circuit design completely, without any mechanical movable parts, it is characterized in that: fus FU1 and fus FU2 is connected in input voltage loop, commutation diode D1-D4 forms bridge rectifier, the output negative pole ground connection of this bridge rectifier, one end of resistance R3, one end of electric capacity C1 ~ C3, one end of piezoelectric driving plate JZ and the source electrode ground connection successively of fet VT, resistance R1 ~ R3 connects successively, the positive pole of diode D6 is connected on the line between resistance R1 and resistance R2, the negative pole of diode D6 connects the power end VDD of electric capacity C2 and inverter ic, the input end A of electric capacity C1 and inverter ic is connected on the line between resistance R2 and resistance R3, the output terminal Y of inverter ic connects the grid of fet VT, the drain series resistance R4 series connection of fet VT forms discharge switch branch road, diode D5 is connected on the line between resistance R1 and resistance R0, and the output cathode of the positive pole contact resistance R1 of diode D5 and bridge rectifier, the negative pole contact resistance R0 of diode D5, one end of the other end contact resistance R4 of resistance R0, first be connected in parallel again after series connection, piezoelectric driving plate JZ and electric capacity C3 and resistance R4 fet VT series arm are in parallel, when described be input as VDC time, commutation diode D1-D4, electric capacity C1 and electric capacity C3 are not set in drive circuit, to eliminate unnecessary materials consumption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510346242.0A CN104913097B (en) | 2015-06-20 | 2015-06-20 | Piezo electric valve |
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| CN201510346242.0A CN104913097B (en) | 2015-06-20 | 2015-06-20 | Piezo electric valve |
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| CN104913097A true CN104913097A (en) | 2015-09-16 |
| CN104913097B CN104913097B (en) | 2017-03-08 |
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| CN201510346242.0A Active CN104913097B (en) | 2015-06-20 | 2015-06-20 | Piezo electric valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370958A (en) * | 2015-12-23 | 2016-03-02 | 山东大学 | Membrane servo valve driven by piezoelectric ceramics |
| CN108518521A (en) * | 2018-04-21 | 2018-09-11 | 肖国选 | Auto-manual piezo electric valve |
| CN108547975A (en) * | 2018-04-21 | 2018-09-18 | 肖国选 | Auto-manual closes piezo electric valve slowly |
| CN113042122A (en) * | 2021-04-12 | 2021-06-29 | 万丛姗 | Smell delivery instrument based on micro-fluidic |
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| CN2269507Y (en) * | 1996-05-24 | 1997-12-03 | 刘克俭 | High stable electric control piezoelectric valve |
| CN101573548A (en) * | 2006-12-27 | 2009-11-04 | 株式会社村田制作所 | Piezoelectric valve |
| EP2017511A1 (en) * | 2007-07-19 | 2009-01-21 | Hoerbiger Automatisierungstechnik Holding GmbH | Piezo-electric valve |
| US8556227B2 (en) * | 2009-07-20 | 2013-10-15 | Burkhard Buestgens | Temperature-compensated piezoelectric flexural transducer |
| CN104500812A (en) * | 2014-12-12 | 2015-04-08 | 刘庆荣 | Electric low-power-consumption valve |
| CN204704455U (en) * | 2015-06-20 | 2015-10-14 | 肖国选 | Piezo electric valve |
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| CN105370958A (en) * | 2015-12-23 | 2016-03-02 | 山东大学 | Membrane servo valve driven by piezoelectric ceramics |
| CN105370958B (en) * | 2015-12-23 | 2017-11-21 | 山东大学 | A kind of Piezoelectric Ceramic diaphragm type servo valve |
| CN108518521A (en) * | 2018-04-21 | 2018-09-11 | 肖国选 | Auto-manual piezo electric valve |
| CN108547975A (en) * | 2018-04-21 | 2018-09-18 | 肖国选 | Auto-manual closes piezo electric valve slowly |
| CN113042122A (en) * | 2021-04-12 | 2021-06-29 | 万丛姗 | Smell delivery instrument based on micro-fluidic |
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